//第三题
import java.util.Scanner;
public class M80603 {
    public static void main(String[] args) {
        Scanner in=new Scanner(System.in);
        System.out.println("请输入数字");
        int num=in.nextInt();
        if(num%7==0){
            System.out.println("是七的倍数");
        }else {
            System.out.println("不是七的倍数");
        }
    }
}
